V6.0 with breaking changes

[techlake]

• Replaced az cli with PowrShell Azure Resource Graph Queries and MS Graph for simplification and performance improvements
• Simplified cmdlet names for readability
• Simplified global-settings.jsonc
• Added shared responsibility and sophisticated brownfield capabilities with desired state strategy in global-settings.jsonc
• Added support in scripts for GitLab pipelines (no GitLab starter pipeline yet)
• Assignment Parameter definitions in Excel or CSV instead of JSON for easier maintainability of large Policy Sets
• Renamed Definitions folder to align with Microsoft naming conventions
• Make the Properties element optional in Policy resource definitions
• Fixed bugs Not specifying a pac environment causes it to return an array not a hashtable #109 , Missing parameter in definition causes error - Confirm-ParametersMatch #104 , Bug: desired state for Exemptions scoped at individual resource when resource is removed #70, Error on Deploy Policies, Initiatives, Policy Assignments step #58